Select difference between API 5L PSL1 and PSL2

The technical committee authors the standards recognized that there are two basic categories for API 5L steel pipe. They are PLS1 and PSL2 among seamless steel pipe and welded steel pipe.

PSL 1 is a standard for line pipe, while PSL 2 contains additional chemical, mechanical properties, and testing requirements. How to choose them from the market? Here is the list for the select difference between them. And this would give customers help once you need to know detailed information about them before they are applied in engineering project.

From the difference list, we can figure out that there are difference on certification, nondestructive inspection and seamless traceability. So these are our main points when purchasing.